Leaf hinge



March 4, 1952 5. CALDWELL ET AL 2,587,818

LEAF HINGE Filed Dec. 13, 1946 Attorney Patented Mar. 4, 1952 LEAF HINGEStanley Benson Caldwell, Caldy, WirraLand Eric Hurley, Greasby, Wirral,England Application December 13, 1946, Serial No. 716,096 In GreatBritain May 23, 1945 Section 1, Public Law 690, August 8, 1946 Patentexpires May 23, 1965 4 Claims. 1

This invention relates to leaf or butt hinges as commonly applied todoors, furniture, and the like, and has for its primary object to rendersuch a hinge easy to fit correctly by unskilled persons withoutliability of damage to the door and its jamb or frame (hereinafter, forconvenience of description, referred to as frame), and greatly reducingthe time required to fix the hinge and hang the door.

Our hinge is characterised by the provision, in the vicinity of thehinge pin, of projections which form corners in conjunction with theleaves themselves, and which corners are adaped respectively to receivethe adjacent edges of a door and frame and to correctly align same.

We will now describe our invention with the aid of the accompanyingdrawings which illustrate, by way of example only, and not oflimitation, one mode of embodying same.

In said drawings, Fig. 1 is an oblique projection of a hinge in openposition, and Fig. 2 shows the hinge when closed. Fig. 3 is a sectiontaken as on line A-A Fig. 1, and Fig. 4 is a section, taken as on lineBB Fig. 2. Figs. 5 and 6 are oblique projections of the leaf blanksprior to association with the pivot pin, and Fig. 7 is a perspectiveview of the assembled hinge, drawn to a reduced scale as compared withthe preceding views.

In the various figures a represents a plate metal leaf component fromthe blank whereof a part b has been removed to form the other leaf; bothleaves a, b, are pivotally associated by encirclement at a brespectively, with an off-set hinge pin a.

Formed by spacedly cutting leaf b are a pair of tongues b which,extending through slots 1) stamped out of leaf b, constitute a corner XFigs. 3 and 4-for the reception of the door (1, whilst the off-settingdisposition of pin 0 on the side of the hinge opposite to said tongues bprovides a corner X for the reception of the frame e.

Said hinge corners X, X thus make certain that, when the door it isclosed, the adjacent faces Y-Y (Fig. 4) of the door and frame are in thesame plane. The thickness of a leaf ensures the correct gap Z betweenthe door and its frame.

1 represents a strip of metal which has been struck from the middle ofthe blank of leaf b and (or a similar piece) is pivotally associated byencirclement at i with pin 0. The hinge is secured to door (1 and frame6 by screws as y entered through holes h of the several leaf componentsa, b, 1.

When the hinge is completely closed, leaf b secured to door it liesflush in the cut-away part a of leaf a secured to door frame 6, andstrip 1 lies flush in the cut-away part b of leaf b, being secured tothe door frame e through the opening a of leaf a. The provision of saidstrip 1. Which constitutes, in effect, a third leaf, renders more securethe attachment of the hinge to the frame, and minimizes the likelihoodof the pin 0 bending in course of use under the weight of the door.

Thus constructed, alignment of the hinge with the edge of a door isautomatically ensured, and the hinge may be fitted quickly andaccurately by an unskilled person, it being merely necessary to positionthe hinge so that the edge of the door is in one corner of the hinge andthe edge of the frame in the other corner of the hinge, when the surfaceof the door on the pivot side must lie flush with the adjacent surfaceof its frame.

Obviously, in a converse fitting disposition, leaf a may be secured todoor 01 and leaf b secured to frame e.

Throughout the foregoing specification the term door is to beinterpreted in its widest sense to include gates, windows, lids and allother such parts as it is required to pivot and similarly the term frameis to be interpreted in its broadest sense as including a frameworkproper, window sash, box edge, gatepost and any other part to which thehinged part is to be hingedly mounted.

What we claim as our invention and desire to secure by Letters Patentis:

1. A leaf hinge comprising a hinge pin, a pair of leaves each having aportion pivotally embracing said pin, one of said leaves having a recessformed in an edge thereof for receiving the second leaf therein in thesame plane therewith when said hing is in its closed position, saidsecond leaf having a plurality of slots: formed therethrough adjacent tosaid hinge pin, and said pin embracing portion of said second leafhaving a plurality of tongues each extending through one of said slotsand from the face of said second leaf with the sides of said tongueswhich extend beyond said second leaf being normal to the face of saidsecond leaf forming corners for aiding in the alignment of the hingewhen being mounted for use.

2. A leaf hinge comprising a hinge pin, a pair of leaves each having alongitudinally extending side portion pivotally embracing said pin, oneof said leaves having a recess formed in an edge thereof for receivingthe second leaf therein in the same plane therewith when said hinge isin its closed position, said second leaf having a series of slots formedtherethrough parallel and adjacent to said pin, and said pin embracingportion of said second leaf having a series of tongues extending fromthe edge thereof each through one of said slots and from said secondleaf at a right angle thereto forming a corner for aiding in thealignment of the hinge when being mounted for use.

3. A leaf hinge comprising a hinge pin, a pair of leaves each having aportion pivotally embracing said pin, one of said leaves having a recessformed in an edge thereof for receiving the second leaf therein in thesame plane therewith when said hinge is in its closed position, saidsecond leaf having a plurality of slots formed therethrough adjacent tosaid hinge pin, said pin embracing portion of said second leaf having aplurality of tongues each extending through one of said slots and fromthe face of said second leaf forming a corner for aiding in thealignment of the hinge when being mounted for use, and each of saidleaves having its hinge pin embracing portion offset relative to theremainder of the leaf with said pin being positioned between therespective planes of said leaves when said hinge is in its openposition.

4. A leaf hinge comprising a hinge pin, a pair of leaves each having aportion pivotally embracing said pin, one of said leaves having a releafhaving a portion pivotally embracing said pin, said second leaf having arecess in an edge thereof for receiving said third leaf therein in thesame plane when the hinge is in its closed position, said second leafhaving a plurality of slots formed therethrough adjacent to said hingepin, and said pin embracing portion of said second leaf having aplurality of tongues each extending through one of said slots and fromthe face of said second leaf forming a corner to aid in the alignment ofthe hinge when being mounted for use.

STANLEY BENSON CALDWELL.

ERIC HURLEY.

REFERENCES CITED The following references are of record in the file ofthis patent:

cess formed in an edge thereof for receiving the UNITED STATES PATENTSNumber Name Date 721,641 Whitehead Feb. 24, 1903 1,482,704 Schwartz Feb.5, 1924 FOREIGN PATENTS Number Country Date 3,831 Great Britain Sept.28, 1878 11,378 Great Britain May 17, 1902 60,947 Austria -1 Apr. 1,1913 178,383 Germany Nov. 10, 1906 338,050 Germany June 13, 1921

